I have a prostate biopsy scheduled next week, and I'd like to be at least somewhat mentally prepared for the outcome. I am reading the journals (I work at a university) to try to determine the likelihood I have prostate cancer based on my PSA results (7.75 ng/ml). No male relative (father, grandfather, uncles) has had prostate cancer to my knowledge. My history of PSA readings during 2010 was that I had 4 tests (Jan 2.5, June 2.3, Nov 16th 4.75, December 1st 2.5). I am 48 years old, I weigh 145 lbs, I'm 5'11. In July 2010 I had a prostate ultrasound, which showed a darkened area, but the doppler test that was part of the exam did not show blood flow in that area. I have not had any urinary symptoms. I have had some erectile dysfunction but I am otherwise healthy. I was constipated at the time of the PSA test. Unfortunately all the journal articles and risk calculators I've found apply mostly to men 55 and over, so I'm not sure whether the PSA results are worse because of my age or better.